On March 27, 2002, the special non-fiction episode "In Their Own Words" which told the real stories of the police officers, firefighters, paramedics, emergency services personnel, and their families in the aftermath of 9/11/01, received the prestigious George Foster Peabody Award for Excellence in Broadcasting.
The 100th episode was shot as a series of 10 minute continuous takes.
In early episodes, the fire house has a Dalmatian called "Mantooth", named after Randolph Mantooth who played paramedic John Gage in "Emergency!" (1972)
Bosco's full name is Maurice Louis Boscorelli, and before he joined the NYPD he was a U.S. Army Ranger.
Bobby Cannavale (Bobby Caffey) trained with doctors and paramedics for 2 months.
Bobby Cannavale (Bobby' Caffey) asked to be released from the show due to a lack of character storyline.
Savannah Haske, who played Sully's wife, is actually 13 months younger than Aaron Stanford, the actor who played her son, Sergei
The 55 Precinct was known as Camelot, because it was on the corner of King and Arthur.